FX_BOOL CCodec_Jbig2Module::Decode(IFX_FileRead* file_ptr,
FX_DWORD& width, FX_DWORD& height, FX_DWORD& pitch, uint8_t*& dest_buf)
{
CJBig2_Context* pContext = NULL;
CJBig2_Image* dest_image = NULL;
FX_DWORD src_size = (FX_DWORD)file_ptr->GetSize();
uint8_t* src_buf = FX_Alloc(uint8_t, src_size);
int ret = 0;
if(!file_ptr->ReadBlock(src_buf, 0, src_size)) {
goto failed;
}
pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, src_buf, src_size, JBIG2_FILE_STREAM, &m_SymbolDictCache);
if(pContext == NULL) {
goto failed;
}
ret = pContext->getFirstPage(&dest_image, NULL);
CJBig2_Context::DestroyContext(pContext);
if (ret != JBIG2_SUCCESS) {
goto failed;
}
width = (FX_DWORD)dest_image->m_nWidth;
height = (FX_DWORD)dest_image->m_nHeight;
pitch = (FX_DWORD)dest_image->m_nStride;
dest_buf = dest_image->m_pData;
dest_image->m_bNeedFree = FALSE;
delete dest_image;
FX_Free(src_buf);
return TRUE;
failed:
if(src_buf) {
FX_Free(src_buf);
}
return FALSE;
}
FX_BOOL CCodec_Jbig2Module::Decode(FX_DWORD width, FX_DWORD height, FX_LPCBYTE src_buf, FX_DWORD src_size,
FX_LPCBYTE global_data, FX_DWORD global_size, FX_LPBYTE dest_buf, FX_DWORD dest_pitch)
{
FXSYS_memset32(dest_buf, 0, height * dest_pitch);
CJBig2_Context* pContext = CJBig2_Context::CreateContext(&m_Module,
(FX_LPBYTE)global_data, global_size, (FX_LPBYTE)src_buf, src_size, JBIG2_EMBED_STREAM, &m_SymbolDictCache);
if (pContext == NULL) {
return FALSE;
}
int ret = pContext->getFirstPage(dest_buf, width, height, dest_pitch, NULL);
CJBig2_Context::DestroyContext(pContext);
if (ret != JBIG2_SUCCESS) {
return FALSE;
}
int dword_size = height * dest_pitch / 4;
FX_DWORD* dword_buf = (FX_DWORD*)dest_buf;
for (int i = 0; i < dword_size; i ++) {
dword_buf[i] = ~dword_buf[i];
}
return TRUE;
}
